4. Rebecca Black
“Friday” is a low-budget video on YouTube that made unknown singer Rebecca Black internationally famous. This song soon became so viral that inspired several parodies and received millions of views just in a couple of weeks. Thanks to this success Black also earned an appearance on the “The Tonight Show” with Jay Leno, and she was also noticed by celebrities like Bieber and Jonas Brothers. Rebecca now has 1.2 million subscribers on her YouTube channel and has won the Choice Web Star reward.
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